Catalytic washcoat with added alumina for NOx abatement
US12163454B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2019 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Feb 26, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2570/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure provides catalyst compositions for NOx conversion and catalytic articles incorporating such catalyst compositions. Certain catalyst compositions include a zeolite with a silica-to-alumina ratio from 5 to 20 and sufficient Cu exchanged into cation sites of the zeolite such that the zeolite has a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component in a concentration in the range of 1 to 20 wt. %, the copper trapping component including a plurality of particles having a particle size of about 0.5 to 20 microns. Certain catalyst compositions include, as the copper trapping component, alumina present as a plurality of alumina particles with a D90 particle size distribution in the range of 0.5 microns to 20 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.